CN101921128B - Pouring material for lime rotary kiln - Google Patents

Pouring material for lime rotary kiln Download PDF

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Publication number
CN101921128B
CN101921128B CN2010102750998A CN201010275099A CN101921128B CN 101921128 B CN101921128 B CN 101921128B CN 2010102750998 A CN2010102750998 A CN 2010102750998A CN 201010275099 A CN201010275099 A CN 201010275099A CN 101921128 B CN101921128 B CN 101921128B
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China
Prior art keywords
parts
granularity
alumina
millimeter
corundum
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Expired - Fee Related
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CN2010102750998A
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Chinese (zh)
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CN101921128A (en
Inventor
徐国涛
金升怀
张洪雷
饶发明
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Wuhan Iron and Steel Group Corp
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Wuhan Iron and Steel Group Corp
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Abstract

The invention relates to a pouring material for a lime rotary kiln, which comprises the following components in parts by weight: 30-45 parts of corundum or alumina with the granularity of 3-8mm, 10-25 parts of corundum or alumina with the granularity of 1-3mm, 3-7 parts of andalusite or flint clay with the granularity of 0.1-1mm, 3-10 parts of corundum or alumina with the granularity of smaller than 1mm, 5-20 parts of refractory powder with the granularity of not more than 0.074mm, 2-6 parts of silicon dioxide micropowder, 2-6 parts of aluminum oxide micropowder, 2-10 parts of silicon carbide powder with the granularity of not more than 0.074mm, 0.01-0.15 part of water reducing agent FDN, 3-7 parts of calcium aluminate cement containing 40-55 percent by weight calcium oxide, 0.1-2 parts of calcium aluminate cement containing 20-30 percent by weight calcium oxide and not more than 0.1 part of coagulant. The pouring material of the invention has high strength and long service life.

Description

A kind of mould material that is used for lime rotary kiln
Technical field
The present invention relates to a kind of mould material, especially belong to the mould material that is used for lime rotary kiln.
Background technology
The kiln temperature of producing quickened lime is lower, and generally about 1000 ℃, rotary kiln kilneye preheater is built very difficulty of refractory brick by laying bricks or stones owing to be the structure of tapered cylinder shape, therefore uses mould material many.The present mould material of using is generally alumina or brown corundum is the steel fiber enhancing mould material of aggregate, fine powder, but for lime rotary kiln, adopts coal injection to burn as thermal source; The scope of its heating generally concentrates near the interior clinkering zone of kiln, and the temperature of kiln hood is lower, should be in 500~700 ℃ scope; Owing to use aluminous cement as wedding agent, it is poor that it solidifies the back curing condition, is difficult to maintenance; And under 500~700 ℃ temperature, mould material rely on cement to solidify the bonded strength ratio lower, therefore; Be difficult to keep out the impact and the wearing and tearing of Wingdale; The furnace lining of cast is very low work-ing life, just needs to change less than 2 months sometimes, influences the production of lime rotary kiln.Therefore, adopt high-intensity high-abrasive material to produce the mould material of lime rotary kiln, the life-span that helps improving the kilneye preheater, the maintenance cost of reduction equipment.
Chinese patent 200810020997 provides a kind of wear-resistant castable that is used for various large-scale cement rotary kilns and incinerator; The component of its parts by weight is: 35~55 parts of 10~20 parts of the porcelain grains of 15~25 parts of 0~1 porcelain grains, 1~5mm, 1~5mm calcining andaluzite particles, 1,000 4~6 parts of purpose Alpha-alumina micro mists, 3~5 parts of silicon powders, 4~5 parts of pure calcium aluminate cements, 0.1~0.3 part of silicates water reducer, 5~7 parts in water have stronger alkaline-resisting, chlorine erosion performance and higher refractoriness and abrasive wear resistance.Chinese patent 97108607 provides a kind of high-strength fireproof pour material that is applicable to various Industrial Stoves, smelting furnace; It is by suitable granularity; The bauxites aggregate of suitable proportion, high-alumina fly, zircon sand, lapis amiridis and additive, wedding agent are formulated, have HS, slag resistance, volume stability.Chinese patent 200710052986 provides a kind of preparation method of fire-resistant gravity flow pouring material, and its composition (wt%) is: alumina particle: 35~55, alumina fine powder: 5~20, corundum fine powder: 5~25, electric smelting haydite sand: 5~30, pure calcium aluminate cement: 2~10,2~6 silicon powder, α-Al of 1~10 2O 3Micro mist, 0.1~0.2 water reducer; Mould material after the mixing and stirring has good fluidity, density is high, intensity is good, is used for thermal kiln furnaces such as process furnace furnace lining, permanent ladle layer, tundish permanent layer; Chinese patent 200810197069 has proposed to be used to mould material of making pellet ore rotary kiln and preparation method thereof; Its component (wt%) is: the mould material matrix: 70~92, the micro mist of the micro mist of silicon oxide or aluminum oxide: 3~8, zirconium mullite or zircon: 0.01~5, silit: 1~12, aluminous cement: 0.05~5; Said mould material matrix is one or more in corundum, alumina, the mullite, the life-span that can improve rotary kiln.
Generally all use pure calcium aluminate cement with addition of silicon powder, α-Al in these inventions 2O 3Micro mist forms the combination phase solidify, and its deficiency is: many if mould material adds water, expect rarelyr, and heavy abrasive aggregates just is deposited to the feed opening bottom of cast easily, and furnace lining is inhomogeneous, local easy abrasion destruction; If expect too driedly, badly again flow, vibration, form hollow easily; The baking of cement bonded mould material is bad, and performance does not reach the index of expection; Under the curing condition that does not have baking and standard, the ultimate compression strength under 500~1000 ℃ the temperature has only 30~60MPa sometimes, can not satisfy the practical requirement of production.
Summary of the invention
The objective of the invention is to overcome the deficiency that kiln lining material intensity is low, the life-span is short of the lime of present existence; Provide a kind of through improving the composition of material; The intensity of mould material is improved, thereby increase life cycle, reduce the lime rotary kiln of maintenance cost and use mould material.
Realize the technical measures of above-mentioned purpose:
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters corundum or an alumina: 30~45 parts, granularity is 1~3 millimeter corundum or an alumina: 10~25 parts; Granularity is 0.1~1 millimeter andaluzite or a flint clay: 3~7 parts; The corundum or the alumina of granularity<1 millimeter are: 3~10 parts, and the refractory powder of granularity≤0.074 millimeter: 5~20 parts, silicon-dioxide differential: 2~6 parts; Alumina powder: 2~6 parts; 2~10 parts of the carborundum powders of granularity≤0.074 millimeter, water reducer FDN:0.01~0.15 part contains the quicklime weight percent and is 40~55% aluminous cement: 3~7 parts; Contain the quicklime weight percent and be 20~30% aluminous cement: 0.1~2 part, setting accelerator≤0.1 part.
It is characterized in that: described setting accelerator is K 2CrO 7Or FeSO 4The mixture of a kind of or both arbitrary proportions in two kinds.
Characteristics of the present invention are through the improvement to lime rotary kiln furnace lining mould material, improving the intensity of its mould material, thus the problem that furnace lining intensity is low to overcome, the life-span is short, and maintenance cost is reduced.
Embodiment
Do below and further describe:
Embodiment 1
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters a corundum: 30 parts, granularity is 1~3 millimeter a corundum: 15 parts; Granularity is 0.1~1 millimeter a andaluzite: 7 parts, the corundum of granularity<1 millimeter is: 8 parts, and the refractory powder of granularity≤0.074 millimeter: 5 parts; The silicon-dioxide differential: 6 parts, alumina powder: 2 parts, 5 parts of the carborundum powders of granularity≤0.074 millimeter; Water reducer FDN:0.01 part; Contain the quicklime weight percent and be 45% aluminous cement: 5 parts, contain the quicklime weight percent and be 20% aluminous cement: 2 parts, K 2CrO 70.01 part.
Embodiment 2
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters a alumina: 33 parts, granularity is 1~3 millimeter a alumina: 10 parts; Granularity is 0.1~1 millimeter a flint clay: 3 parts, the alumina of granularity<1 millimeter is: 6 parts, and the refractory powder of granularity≤0.074 millimeter: 8 parts; The silicon-dioxide differential: 5 parts, alumina powder: 4 parts, 2 parts of the carborundum powders of granularity≤0.074 millimeter; Water reducer FDN:0.016 part; Contain the quicklime weight percent and be 40% aluminous cement: 3 parts, contain the quicklime weight percent and be 25% aluminous cement: 1.5 parts, FeSO 40.08 part.
Embodiment 3
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters a alumina: 38 parts, granularity is 1~3 millimeter a alumina: 25 parts; Granularity is 0.1~1 millimeter a flint clay: 4 parts, the alumina of granularity<1 millimeter is: 3 parts, and the refractory powder of granularity≤0.074 millimeter: 12 parts; The silicon-dioxide differential: 2 parts, alumina powder: 6 parts, 7 parts of the carborundum powders of granularity≤0.074 millimeter; Water reducer FDN:0.08 part; Contain the quicklime weight percent and be 50% aluminous cement: 7 parts, contain the quicklime weight percent and be 30% aluminous cement: 1 part, K 2CrO 7With FeSO 4Mix 0.02 part.
Embodiment 4
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters a corundum: 42 parts, granularity is 1~3 millimeter a corundum: 22 parts; Granularity is 0.1~1 millimeter a andaluzite: 5 parts, the corundum of granularity<1 millimeter is: 10 parts, and the refractory powder of granularity≤0.074 millimeter: 16 parts; The silicon-dioxide differential: 4 parts, alumina powder: 3 parts, 10 parts of the carborundum powders of granularity≤0.074 millimeter; Water reducer FDN:0.15 part; Contain the quicklime weight percent and be 55% aluminous cement: 5 parts, contain the quicklime weight percent and be 29% aluminous cement: 0.1 part, K 2CrO 7With FeSO 4Mix 0.05 part.
Embodiment 5
A kind of mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters a alumina: 45 parts, granularity is 1~3 millimeter a alumina: 22 parts; Granularity is 0.1~1 millimeter a flint clay: 5 parts, and the alumina of granularity<1 millimeter: 10 parts, the refractory powder of granularity≤0.074 millimeter: 20 parts; The silicon-dioxide differential: 5 parts, alumina powder: 4 parts, 7 parts of the carborundum powders of granularity≤0.074 millimeter; Water reducer FDN:0.12 part; Contain the quicklime weight percent and be 40% aluminous cement: 4 parts, contain the quicklime weight percent and be 20% aluminous cement: 1 part, K 2CrO 7With FeSO 4Mix 0.006 part.
The laboratory sample of the foregoing description is through detecting, and its performance is seen table 1.
Table 1
Embodiment Ultimate compression strength (MPa, 1000 ℃ * 3h)
1 63.87
2 123.07
3 105.63
4 61.09
5 127.67
Can find out from the experimental data of table 1; The mould material of lime rotary kiln reaches more than the 100MPa at the ultimate compression strength majority of 1000 ℃ * 3h; Intensity is high, and abrasion resistance properties is good, and the rotary kiln charging opening of cast and preheater furnace lining can be brought up to 5 months by former 1~2 month work-ing life.

Claims (2)

1. mould material that is used for lime rotary kiln, its component and weight part are: granularity is 3~8 millimeters corundum or an alumina: 30~45 parts, granularity is 1~<3 millimeter corundum or an alumina: 22~25 parts; Granularity is 0.1~1 millimeter andaluzite or a flint clay: 3~7 parts; The corundum or the alumina of granularity<1 millimeter are: 3~10 parts, and the refractory powder of granularity≤0.074 millimeter: 8~20 parts, fine silica powder: 2~6 parts; Alumina powder: 2~6 parts; 7~10 parts of the carborundum powders of granularity≤0.074 millimeter, water reducer FDN:0.01~0.016 part contains the quicklime weight percent and is 40~55% aluminous cement: 3~7 parts; Contain the quicklime weight percent and be 20~30% aluminous cement: 0.1~2 part, setting accelerator≤0.1 part.
2. a kind of mould material that is used for lime rotary kiln as claimed in claim 1 is characterized in that: described setting accelerator is K 2CrO 7Or FeSO 4The mixture of a kind of or both arbitrary proportions in two kinds.
CN2010102750998A 2010-09-08 2010-09-08 Pouring material for lime rotary kiln Expired - Fee Related CN101921128B (en)

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Publication number Priority date Publication date Assignee Title
CN102964129A (en) * 2011-09-02 2013-03-13 上海宝钢工业检测公司 Pitch coke rotary kiln furnace lining refractory castable, composite precast block and preparation method
CN103183514A (en) * 2011-12-31 2013-07-03 上海宝明耐火材料有限公司 Hot repair mat for molten iron desulphurization
CN102951915A (en) * 2012-11-19 2013-03-06 长兴攀江冶金材料有限公司 Self-flowing casting material and preparation method thereof
CN103553671B (en) * 2013-10-29 2014-10-22 宁夏天纵泓光余热发电技术有限公司 High-strength pouring material for pouring basket of continuous caster
CN103979987B (en) * 2014-05-20 2016-04-20 湖州浙宝冶金辅料有限公司 Hot wear-resisting, alkaline-resisting spray material of a kind of lime stove liner and preparation method thereof
CN104710182B (en) * 2015-03-18 2017-03-29 浙江自立新材料股份有限公司 A kind of preparation method and castable of dispersibility aluminium oxide for castable
CN105461333A (en) * 2015-12-14 2016-04-06 芜湖新兴铸管有限责任公司 Lime rotary kiln castable
CN107098709A (en) * 2017-04-19 2017-08-29 浙江华尔耐科技股份有限公司 A kind of sludge solid waste regeneration treatment haydite kiln castable

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CN1683283A (en) * 2004-04-15 2005-10-19 宜兴市泰科耐火材料有限公司 Silicon carbide corundum pouring material

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CN1450020A (en) * 2003-05-09 2003-10-22 宜兴天霸非金属材料有限公司 Alkali-resistant, chlorine-resistant and fire-resistant casting material
CN1683283A (en) * 2004-04-15 2005-10-19 宜兴市泰科耐火材料有限公司 Silicon carbide corundum pouring material

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